It doesn’t take much to get Katy Perry out of her top. The “Waking Up In Vegas” star and notorious British womanizer Russell Brand have been inseparable since taking up with each other shortly after last month’s MTV Video Music Awards. According to a snitching pal, Katy’s was so moved be a love poem Brand recently penned — or rather texted in her honor — so was compelled to get naked. Yeah, sappy love poems have that effect on us, too.  “It was cute…..And the best part is that Katy responded by sending him a topless photo of herself.”‘